a tosser is similar to a wanker, well, its really exactly the same. tossing and wanking are both different words for masterbation. if you dont know what any of those words mean, dont use them.
as above but more like wanker than dickhead, as the toss in tosser refers to the tossing motion of masterbation (or tossing-off). A tosser is someone who masterbates.
In baseball, when a pitcher has an outright horrificperformanceto the point the home crowd may even be booing their own team. Usually the type of game you will be leaving early -- a stinkfest.
Billy: did you see the game last night bro?
Hubert: dude, Shawn tossed a stinker giving up 9 runs in one inning... it was so bad even our home crowd was booing -- total stinkfest -- embarrassed I was even there bro. Shawn's ERA is ruined for the rest of the season now LMAO