drudgerous

Adjective

 * 1)  Of or pertaining to drudgery; tedious, menial and exhausting.

Usage notes
This word is in active use in both formal (see quotes below) and informal settings in the United States, but it is not considered a word by many dictionaries or spell-check systems.

Quotations
-Senator Michael Lee, Nomination Committee meetings of Brett Kavanaugh to US Supreme Court
 * "We get tired of the busy, drudgerous work of actually making laws, and we also do not want to make ourselves accountable for the laws we pass."

-Melissa Abrehamsen, Sumter News-Sun
 * "No one wins when someone pours themselves into the drudgerous role of caregiver..."