Simple past tense and past participle of slang.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "slanged" in a sentence
"It was certainly only an American who could have the tension of Mr. Wendover; his solemnity almost made her laugh, just as her eyes grew dull when people 'slanged' each other hilariously in her sister's house; but at the same time he gave her a feeling of high respectability."
"She would have "slanged" the Emperor himself with the self-same coolness, and the Army had given her a passport of immunity so wide that it would have fared ill with anyone who had ever attempted to bring the vivandiere to book for her uttermost mischief."
"Yes ... 'twould be about ten years since she'd dropped Cumming's acquaintance abruptly, and my lurid imagination could conjure up the scene in some silken nest of sin around South Audley Street, circa 1880, Cumming all moustachioed and masterful in his long combinations and my adulterous angel bursting proudly out of her corset as they slanged each other across the crumpled sheets of shame."