that's weak 

generally unimpressive or how some people would put it, "sad"

Person 1: I got a B+ on my test.
Person 2: JUST a B+? That's weak.

that's weak by xLxIxNxDxSxAxYX February 25, 2008

that's weak 

that's extremely funny

omg, he fell on his face! That's WEAK!

that's weak by katelin pinto August 26, 2006

thats weak 

That sucks or that's not cool.

If you have arthritis and have to get a new hip, then thats weak.

thats weak by Deh August 28, 2006