See Synonyms at limp.
Lacking vigor or energy: flaccid management.
lacking normal or youthful firmness
adj 1: lacking in strength or firmness or resilience; "flaccid muscles"; "took his lax hand in hers"; "gave a limp handshake"; "a limp gesture as if waving away all desire to know" G.K.Chesterton; "a slack grip" syn: lax, limp, slack 2: lacking firmness or stiffness; "flabby around the middle"; "flaccid cheeks" syn: flabby
2) When the male penis is unhappy :(
3) "Down" time
Wife: DAMNIT!! WTF IS WRONG WITH YOU
Husband: (pops some Viagra) Give me 5 five more minutes!