A figurative expression for the body, used also by Paul, 2Co 5:1, 2Co 5:4, though he employs the shorter kindred word σκῆνος. Peter also has the same mixture of metaphors which Paul employs in that passage, viz., building and clothing. See next verse. Peter's use of tabernacle is significant in connection with his words at the transfiguration, “Let us make three tabernacle (Mat 17:4). The word, as well as the entire phrase, carries the idea of brief duration - a frail tent, erected for a night. Compare 2Pe 1:14.
To stir you up by putting you in remembrance (διεγείρειν ὑμᾶς ἐν ὑπομνήσει)
Lit., to stir you up in reminding. See the same phrase in 2Pe 3:1.