straight
tongue-in-cheek
funny ha-ha
earnest
facetiously
in fun
for fun
jokeman
take someone at their word
nonhumoral
abderian
meme
unkiddingly
no really
nonhumorous
unhumorous
superserious
unfacetious
make light of
mockingstock
unironic
no laughing matter
balls about
deedy
silly
serious
and I don't mean maybe
assclown
too much
earnestness
jocularism
seriousness
quizzacious
unhumorously
serious-mindedness
gagmeister
sincerity
frivolous
fuck
button-down
nonfunny
humoristically
it's a joke, Joyce
heart to heart
unteasing
self-serious
knockabout
grouch
no-nonsensely
acid-tongued