They called him ’Yo-Yo’ jocularly and came in tipsy late at night and woke him up with their clumsy, bumping, giggling efforts to be quiet, then bombarded him with asinine shouts of hilarious good-fellowship when he sat up cursing to complain.
There are no more uses of "jocular" in the book.
Show samples from other sources
"Oops!" her father agreed jocularly.
Sara Shepard -- Pretty Little Liars
"You’re rude, jocular; and the one time you do something serious, it tears at the fabric of our nation.