Whichever one pulls up more search results. That's likely the more widely used one, so if you are really dead set on one or the other...pick the one with more results. .
General rule is the shorter, the better. Also, I don't think people will remember to spell 'uh' like 'uhh' so go with the shorter one
THANKS FOR HELPING ME OUT IN THIS SITUATION . . . i thought it was a good name when i was signing up for something on the net and for the email i typed in LOLuhNO @ aol . com and then i was like waita minute that is kinda funny LOL well thanks again for everyones advice !
okay for example . . . A guy approaches A HOT girl but has a WHACK @$$ pick up line . . . then the girl (Laughs Out Loud) in her head and says " UH NO! " so i plan on having women talk about the stupid stuff men say and do . . . what do you think ?