Splurge

Possibly from a blend of splash and surge.

Full definition of splurge

To gush, to flow or move in a rush.The tomato sauce was splurged all over the chips.

1884, Donald Grant Mitchell, , Norwich, 1659-1859,But the steamboats come in their time ; and I am sure that I address a large crowd of sympathizing auditors, now that I come to speak of the magnificent old "Fanny," spluttering and paddling, and splurging up to the little wharf under the lea of Peppers Hill, where the pine wood lay piled in fabulous quantities.
1913, Edith Wharton, , Chapter XXXVIII,She waited a moment, quivering with the expectation of her husband's answer; then, as none came except the silent darkening of his face, she walked to the door and turned round to fling back: "Of course you can do what you like with your own house, and make any arrangements that suit your family, without consulting me; but you needn't think I'm ever going back to live in that stuffy little hole, with Hubert and his wife splurging round on top of our heads!"
1930, Robert E. Howard, ,"And boy," he splurged, "we are filming a peach, a pip and a wow! Is it a knockout? Oh, baby! A prize-fight picture entitled 'The Honor of the Champion,' starring Reginald Van Veer, with Honey Precious for the herowine. Boy, will it pack the theayters!"

To spend lavishly or extravagantly, especially money. from 1911They decided to splurge on the biggest banana split for dessert.

1912, Jack London, The House of Pride.I could see Schultz think, and revive, and splurge with his bets again.

(plural splurges)