fess up

confess (English)

(religion) To hear or receive such a confession of sins from.. (religion) To unburden (oneself) of sins to God or a priest, in order to receive absolution.. To admit to the truth, particularly in the context of sins or crimes committed.. To disclose or reveal.. To acknowledge faith in; to profess belief in.

up (English)

(computing, slang, transitive) To upload.. (intransitive) To act suddenly, usually with another verb.. (intransitive) To ascend; to climb up.. (transitive, colloquial) To increase or raise.. (transitive, colloquial) To promote. (colloquial) At (a given place, especially one imagined to be higher or more remote from a central location).. (vulgar slang) Of a man: having sex with.. From south [...]

fess up (English)

(intransitive, slang) To confess to something; to admit something.