Mary's Ex-Boyfriend, also called Boss, appears in the episodes, "Have You Seen This Snail?" and "Gary in Love" as the main antagonist. As his name indicates, he used to be Mary the Snail's boyfriend. He appears very dangerous because of his numerous threats to Gary. He also has his own gang with other dangerous snails. At the end of Gary in Love, he apologizes to Gary about being mean to him (possibly due to sympathy) and invites him to dinner.
Boss has a purple shell with a blue swirl and blue dots he also has a scar on his shell. He has olive colored skin and wears a brown hat. He and his gang's meows are translated into English for the audience's sake except for when he's talking to a pet store owner. He is voiced by Jimmy Dean.
"Hey, Light wit! What do you think you're doin with my girl? (to Gary) Come on Mary, let's go". (to Mary)
"You've just made a big mistake pal".
"Hey, this ain't over, Runt! When I'm get thought with you, The doctor won't know where to sow your lips back on...or two! (two of the other angry snails slither up to their leader of the snail gang) That little runt is goin to get what's comin to him!"
"After me, fellas".
"Cause bad guys don'ts never use the front!"
"All right. listen up! Any of you seen a snail come through here? About a... ye tall, a shell, couple of eyes?"
"Oh, okay, Let's see here. uhh, This pecticular snail think it's real funny to make Goo Goo eyes at my girl. (All the other snails laugh and continued playing and doing stunts) Hey! What are yous gigglin at? Theys gigglin at me! Alright, that it! yous all goin on my list! you's got that... 'You re' on the list!"
"Meow meow meow meow?"
"He's trying to pull up the fast one, fellas. (smiles evily) Why don't we give him a taste of our own grand of swift justice?!"