Noun - 1. A sexual partner who's horrendous physical attributes are masked by heavy drinking until the morning after. Synonymous with bucket of yuck
2. A creature who lives in a lagoon, i.e. an Ibis.
1. Oh god, I boinked a fuckin lagoon creature from the bar last night, time to get my shit checked.
2. Look at that Ibis... it's in a lagoon.