Pardon me being outrageous boast (8)
I believe the answer is:
namedrop
'boast' is the definition.
(namedropping is boasting about people you've met)
'pardon me being outrageous' is the wordplay.
'being outrageous' indicates an anagram (an outrageous spelling).
'pardon'+'me'='pardonme'
'pardonme' is an anagram of 'NAMEDROP'.
(Other definitions for namedrop that I've seen before include "attempt to impress" , "Try to impress by talking about 'important' connections" .)