'bow out' definitions:

Definition of 'bow out'

(from WordNet)
verb
Remove oneself from an obligation; "He bowed out when he heard how much work was involved" [syn: chicken out, back off, pull out, back down, bow out]
verb
Retire gracefully; "He bowed out when he realized he could no longer handle the demands of the chairmanship" [syn: bow out, withdraw]

Synonyms of 'bow out'

From: Moby Thesaurus