Self-Deficating

1: [babbling on for minutes]
2: Mmm-hmm.
1: I'm pretty, uh... I'm pretty... I make fun of myself a lot.
2: Sure.
1: I was going to say "self-deprecating," but I was scared I'd say "self-deficating."
2: [laughs]
1: What?
2: I wouldn't guess you think that far ahead when you're talking.