hail-fellow-well-met
adjective
• showing excessive familiarity or friendliness.
• "Arnold was very cheerful in a hail-fellow-well-met sort of way"
Similar:
convivial,
sociable,
outgoing,
gregarious,
companionable,
friendly,
genial,
affable,
amiable,
congenial,
agreeable,
good-humoured,
extrovert,
extroverted,
uninhibited,
couthy,
backslapping,
chummy,
pally,
clubbable,
clubby,
buddy-buddy,
matey,
conversable,
