Loudmouth going on vacation packs lingerie pictures (8)
I believe the answer is:
braggart
'loudmouth' is the definition.
(thesaurus)
'going on vacation packs lingerie pictures' is the wordplay.
'on vacation' means to remove the middle letters (after the inside letters have vacated the word).
'packs' is an insertion indicator.
'lingerie' becomes 'bra' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'pictures' becomes 'art'.
'going' with its middle taken out is 'gg'.
'bra'+'art'='braart'
'gg' placed inside 'braart' is 'BRAGGART'.
Can you help me to learn more?
(Other definitions for braggart that I've seen before include "Big boaster" , "Big noter" , "bigmouth" , "One who boasts loudly" , "self-publicist" .)