Disposal of an unnecessary, unwanted, or known to be non-functioning item. Derived from placing something in water to see if it floats--in most cases it will not and will sink out of sight. Example: Get rid of this. Go float-test it or something.
FLOAT TEST (N); FLOAT TESTING
Meaning of FLOAT TEST (N); FLOAT TESTING in English
Slang English vocab. Английский сленговый словарь. 2012