According to the Oxford English Dictionary, "fisk" is a very old word indeed:

fisk, v. Obs. Also 46 fysk(e, 68 fiske.
[Possibly a frequentative (formed with k suffix as in walk, talk, lurk) of OE. fýsan to hurry, or of fésian, fýsian feeze v. Cf. the synonymous Sw. fjäska, a frequentative of fjäsa to bustle, make a fuss.]
intr. To move briskly, scamper about, frisk, whisk; also with about, abroad, in and out, to and fro.
Quot. 1906 is a deliberate archaism.
1340 Gaw. & Gr. Knt. 1704 & he fyskez hem by-fore, Þay founden hym sone.
1393 Langl. P. Pl. C. x. 153 What frek of Þys folde fiskeÞ Þus a-boute?
1440 Promp. Parv. 162/2 Fiskin a-bowte yn ydilnesse, vagor.
1549 Latimer 4th Serm. bef. Edw. VI (Arb.) 104 Than he is busithen he fyskes a brode.
1575 J. Still Gamm. Gurton i. ii. in Dodsl. O. Pl. II. 10 Tome Tannkard's Cowfysking with her taile.
1620 Z. Boyd Zion's Flowers (1855) 114 Why feare yee so, thus fisking in and out?
1700 B. E. Dict. Cant. Crew, Gadding-Gossips, way-going Women, Fidging and Fisking everywhere.
1906 Kipling Puck of Pook's Hill 120 Take me from Pevensey to fisk and flyte through fern and forest.
quasi-trans.
1556 J. Heywood Spider & F. lvii. 242 If he scaped this, at all times to be ware, With faint fond flies, to fiske agayne a warfare.
Hence
fisking vbl. n. and ppl. a. Also
fisker, one who frisks or scampers about.
1440 Promp. Parv. 162/2 Fyscare a-bowte ydylly, discursor, discursatrix, vagulus vel vagator.
1523 Fitzherb. Husb. 45 If a shepe haue mathes, ye shall perceyue it by her bytynge, or fyskynge.
1592 G. Harvey Pierce's Super. 175 Not such an other muttereror a fisking will.
1601 Deacon & Walker Answ. to Darel 190 Being growne very wearie with your violent fiskings.
1611 Cotgr. s.v. Trotiere, A fisking huswife, a raunging damsell.
1620 Z. Boyd Zion's Flowers (1855) 91 ThoughtsCome buzzing so within mybreast, With fisking traine.
1675Rules of Civility v in Antiquary (1880) II. 58/2 Madam, fisking and pratling are but ill ways to please.

... except in the blogosphere, where a good fisking is a fine way to please!