A/N:
Tosspot is an unsatisfactory person, according to my friend Kenzie. But I think she made the word up.
Tosspot
"James you-" Sirius was at a loss for words as the four of them toppled out of the broom cupboard, their brilliant scheme thwarted.
James was too busy staring at the (admittedly very nice) bum of one Lily Evans, thus had missed his cue and ruined their entire prank.
"Why aren't you listening to me?" Sirius snapped, trying to grab his friend and shake him back to sense. "You effing tosspot! You ruin everything!"
"Tosspot?"
"TOSSPOT!" Sirius yelled, leaping to his feet. "We planned this for weeks! And you let Evans distract you and Smith got away!"
James blinked as Lily was finally out of view.
"A man has to have his priorities."
"Ogling Evans' arse is NOT a priority. I am a priority!" Sirius said, thumping James in the head.
James frowned as Sirius stormed off muttering obscenities.
"What's a tosspot?" he asked Remus.