Refers to a fish taking the bait; used in fishing contexts.
The fish aren't biting today.
朝まずめは食いつきがいい。
The bite is good at dawn.
Alternate kanji spelling with okurigana, sometimes seen.
Alternate kanji spelling, less common but still used.
Noun form of the verb 食いつく (to bite at, to take the bait), from 食い (stem of 食う, 'to eat') + つく ('to attach').