table-thumping1
/ˈteɪblˌθʌmpɪŋ/noun
The action or an act of loudly and repeatedly banging one's fist on a table, especially while speaking; (figurative ) the expression of opinions in a loud or aggressive manner; tub-thumping.
Origin
Mid 19th century. From table + thumping.
table-thumping2
/ˈteɪblˌθʌmpɪŋ/adjective
Of a person: engaging in table-thumping, especially loud or aggressive in the expression of opinions; (of words, speech, etc.) characterized by table-thumping; loud, aggressive, and opinionated.
Origin
Early 20th century; earliest use found in Jerome K. Jerome (1859–1927), novelist and playwright. From table + thumping, after thumping.