Amalgamation of the classic insults "Tosser" and "Fuckup".
Typically used when expressing displeasure at another persons actions which have impacted negatively upon you.
And/or someone who performs such actions with regularity
What was that for you litte tossfuck!?
OMG you are such a tossfuck!
Get out of my way you tossfucking little shit!
someone who regularly gets angry for know apparant reason. A variation on 'dont blow a fuse' with toss added as a prefix to suggest that the subject regularly masturbates.
1:"I HATE YOUR GUTS. DON'T YOU DARE DROP YOUR PENCIL AGAIN."
2:"Don't blow a tossfuse."