Noun
Legs able to maintain their possessor upright in stormy weather at sea, that is, ability stand or walk steadily on deck when a vessel is rolling or pitching in a rough sea.
Source: Webster's dictionarysea-legs
It be due time to get yer sea legs! Source: Internet
But then everyone gets their sea legs back, and we're fine again. Source: Internet
If you dont have very stong sea legs you can just enjoy watching the boats racing on Sundays between 10am and 4pm. Source: Internet
The city hasn’t quite gained its sea legs. Source: Internet
He added that a series needs "a season or two to get their sea legs" and find its audience. Source: Internet