The intense feelings of extreme pleasure one gets from watching Leroy Jethro Gibbs, as portrayed by Mark Harmon on the hit tv show NCIS
person 1: OMG, did you catch that new episode of NCIS last night?
person 2: Ohhh yeah! I'm STILL having Gibbsgasms just THINKING about it..
The peak of sexual excitement which is causally related to a gibbs.
"Aron gives me a gibbsgasm."