nuz ‧ zle /ˈnʌz ə l/ BrE AmE ( also nuzzle up ) verb [intransitive always + adverb/preposition, transitive]
[ Date: 1400-1500 ; Origin: nose ]
to gently rub or press your nose or head against someone to show you like them:
Evan leaned forward and began nuzzling her shoulder.
nuzzle against
The horses were nuzzling up against each other.