Top Definition
A heavy gauge metal lock used primarily for securing bicycles. The U-lock gets it's name from a 'U' shaped metal rod that has cutouts at each end to fit into a horizontal locking bar. This is considered to be one of the best bicycle locks.
My bike U-lock is heavy, but at least my bike won't get stolen.
#lock #bicycle #u-lock justice #cyclist #messenger
από Falkon 6 Νοέμβριος 2006
device used for breaking the jaw bones of motorists who think it is humorous to be inconsiderate and endanger the lives of cyclists on the road.

the act of breaking the jaw bone of a motorist, or perhaps smashing out his window.
safety first: always bring your u-lock.

yo, you shoulda seen the way Tido u-lock'd this dumbo's face right off!
#cyclist #courier #traffic #safety #courtesy
από the.scumlife 11 Σεπτέμβριος 2010
The practice of inserting a double ended dildo into the ass hole and pussy at the same time, forming a U shape.
We were at the bachelor's party and I U locked the stripper!
#u lock #dildo #pussy #ass #stripper #bachelor
από Penelope Clearwater 10 Ιούνιος 2008
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