A couple of things that I haven't seen posted yet ... these are more of a temporary effect, (the gained size will wear back off if you stop doing them) but they are fast and will give you a larger difference than just a typical post-PE flaccid.
Look up any make of Arginine Alpha-Ketoglutarate. Products by Swansonvitamins.com , or Bulksupplements.com , or Prima Force (check bodybuilding.com) are low cost and high quality. Taken for several days in a row, AAKG should begin to give you a noticeably fuller hang - ongoing 'semi'/'chubby'.
(If I'm doing an AAKG series at the gym, - as a vasodilator it helps with repair speed and nutrient transport - the difference in my flaccid hang is enough to make my dick kindof aggravating ... like it's always in the way, and you have to watch out about staying out of the water on strange toilets, etc. But it hangs Huge and the printing effect under clothing is really impressive.)
((Spent a couple of minutes getting nuked in a terahertz scanner going through Denver International one time while some T'S'A fa**ots stared at it ... still feel a certain kind of way about that, but I digress))
If you see similar references to L-Citruline Malate 2:1 Complex, that stuff is great for remaining in the body longer for a positive effect on erections and/or erection hardness ... but doesn't have the same increase in flaccid size as AAKG in my experience.
There are articles on this stuff all over here at
MoS going back 5 if not 10 years ..
And if you're not going to be getting naked in front of the chick -at that very moment- find yourself a soft (silicone or rubber) cock ring that fits you without being tight, a snug but not strong fit. This, after a few minutes, will chub you out like crazy, and you should be able to wear it for hours without any problems. The light fit will give you a big chub .. for impressiveness .. but not an actual erection .. which could seem creepy or needy. And the ring itself shouldn't be noticeable through clothing. (Be careful to verify that there are no problems in private where you can experiment and keep watch over it before going out clothed in public where you cannot keep a watch on it. It should never hurt or get dark colors.) Check out the cock rings that are made in a 'flat' style, their force will be spread out over a bigger area and the skin/tissue at your dick's base will thank you for it.
Either one of these tricks could do what you're after. Both of them would be obnoxious. Plus go ahead with regular PE to get the permanent effects across time, if anything these two tricks will also help with that as well.