1) Crashing and burning 2) Doing horribly 3) Failing on purpose 4) Going down in flames 5) Going south 6) Ruler on a beach 
a waterproof skin applied to the walls and floors of basements to prevent the penetration of groundwater. 
The coating of a section of a wall with an impervious material to prevent water penetrating it.
to purposely lose a match, because of poor mental game or other reason; or to purposely lose a non-vital set, so as to focus energy and attention on a match-deciding set.