wallop, n.1 1. [early 19C+] in lit. or fig. use, a resounding blow. 2. [1910s] a large bet. 3. [1910s+] a try. 4. [1910s] a time, a share, a go. 5. [1930s] a success. 6. [1950s] a severe punishment or prison sentence. 7. cocaine . 3 sub-entries