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4.
to be right on the verge of crying.
Man, when she said she'd forget about them girls in Vegas and that I could move back in? I started to tear up bad. She turned around and started getting nekkid, so it was all good playa.
by Guru Voodoo January 16, 2008
 
1.
verb; a violent struggle involving physical force or weapons usually in the context of football related disorder.
John: "Where have you been? We've been in the pub for half an hour"

Dave: "There were a load of 'Yids' at Tottenham Hale Station waiting for a tear up but we showed em' what's what."
by fivepointsix July 11, 2009
 
2.
to be right on the verge of crying. Usually referring to a male; as females, generally speaking, go Niagra when they reach the tears up stage.
Man, when she said she'd forget about them girls in Vegas and that I could move back in? I started to tear up bad. She turned around and started getting nekkid, so it was all good playa.
by Guru Voodoo January 20, 2008
 
3.
to dominate at something. to be the best
"yeah i tear up at chess" says greg.

"no way greg. man your mum tears up in bed" replies rhys
by mordecai kelly October 17, 2007