Fellow stripped outside and got sick (6)

'got sick' is the definition.
The definition and answer can be both related to bodily activities as well as being past participle verbs.
Perhaps there's a link between them I don't understand?

'fellow stripped outside' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'stripped' becomes 'bared' ('bare' can be a synonym of 'strip').
'outside' is an insertion indicator (some letters go outside others).
'f' going within 'bared' is 'BARFED'.

'and' acts as a link.

Can you help me to learn more?