For when a friend goes to bump fists with you and instead you quickly clamp your hand over theirs. It's supposed to feel unpleasant; a mean-spirited fist bump.
My buddy tried to fist bump me yesterday but instead I gave him a trailer hitch! Ha ha, he felt so violated! He was so angry, he chased me down the street!
by AFanOfMatt November 21, 2010
Occurs when one circumsized male touches penis's with another male who is uncircumsized so that the foreskin covers the tip of the uncircumsized penis joining them as one or as a trailer hitch. (Although I don't recommend heavy towing wink wink)
When Rob found out George was from Greece he immediately asked if he had been clipped, since George was most definitely not they dropped trow and trailer-hitch themselves.
by Lloyd Dobler November 04, 2007